Sunday

June 26, 2016
Total # Posts: 2,499

**ap physics**

When a rattlesnake strikes, its head acceler- ates from rest to a speed of 21 m/s in 0.46 s seconds. Assume for simplicity that the only moving part of the snake is its head of mass 200 g. How much (average) power does the rat- tlesnake need to accelerate its head that fast? ...
*February 25, 2011*

**ap physics**

On a frozen pond, a 7 kg sled is given a kick that imparts to it an initial speed of 3.1 m/s. The coefficient of kinetic friction between sled and ice is 0.15. The acceleration of gravity is 9.8 m/s2 . Find the distance the sled moves before coming to rest. Answer in units of m.
*February 25, 2011*

**ap physics**

Karen has a mass of 48.2 kg as she rides the up escalator at Woodley Park Station of the Washington D.C. Metro. Karen rode a distance of 65.7 m, the longest escalator in the free world. The acceleration of gravity is 9.8 m/s2 . How much work did the escalator do on Karen if it...
*February 25, 2011*

**statistics**

The average temperature in households is 67.6 degrees F. The standard deviation is 4.2 degrees F. A random sample of 51 households is to be selected (a) What is the probability that the average of this sample will be above 68.3 degrees F? Probability = (4 decimal places) (b) ...
*February 25, 2011*

**Art Appreciation (college level)**

Art 101 (Art Appreciation) textbook (Gardener's art through the ages) by Kleiner, F.S. 2010 The Western Perspective vol 11 (13th edition) Question: Discuss how the late Gothic sense can be seen as an evident in Berlinghieri's St. Francis Altarpiece.
*February 24, 2011*

**physics**

A slingshot consists of a light leather cup attached between two rubber bands. It takes a force of 32 N to stretch the bands 1.1 cm. a) What is the equivalent spring constant of the rubber bands? Answer in units of N/m.
*February 24, 2011*

**Chemistry**

Why AgSCN is selectively precipitated before the formation of FeSCN2+? given that Ksp of AgSCN = 1x10^-12 and Kinstab of FeSCN2+ = 7.1x10^-3
*February 23, 2011*

**chemistry**

If 0.1200g of sodium carbonate is dissolved in 50 mL of water and titrated with 0.1000 M HCl, how many mL of HCl will be required to reach the second endpoint? CO3^-2 + H^+1 --> HCO3^-1 HCO3^-1,+ H^+1 --> H2CO3
*February 22, 2011*

**Physics please help!!**

a clothes washer starts from rest and spins up with an angular accceleration of 10/rad/s^2. Determine the angle through which the washer has moved afer 6 seconds.
*February 22, 2011*

**precalc**

If is vector a ia 7 units long, the magnitude of vector b is 10 units and the cosine of the angle between the two vectors is -0.3 when they are placed tail-to-tail, what does the inner product of vector a and vector b equal?
*February 21, 2011*

**chemistry**

To what volume should you dilute 126 ml of an 7.90 M CuCl2 solution so that 49.5 ml of the diluted solution contains 5.9 g CuCl2?
*February 20, 2011*

**French-Simple question**

Im trying to find out what each person is studying. Every person in my text has a bubble over their heads, and in that bubble is a picture such as...one person had a bubble picture of a microscope over their heads, so that would mean that they are studing biology. What course/...
*February 16, 2011*

**French**

Est-ce que tu voyages beaucoup? Ou? Oui je Voyage beaucoup à Vancouver. Est-ce que tu aimes prendre des photos? No je n'aime pas prendre des photos. Est-ce qu'il y a une fete dans ta ville? Quand? Oui, il ya un festival dans ma ville et c'est le jour du ...
*February 16, 2011*

**Math**

Assume you work at a company where you are paid hourly. You are paid $8.60 per hour for regular time (less than or equal to forty hours) and time and a half for overtime hours up to fifty hours in one week. If you are asked to work fifty or more hours in one week you are paid ...
*February 16, 2011*

**English**

I'm writing for my opinion but I can't figure out what to write.
*February 14, 2011*

**English**

Can anyone give me details or tell me what else should I talk/ more information on something. I ran out of ideas/ thoughts. This is what I got. What media would you use for your communication skills to advertise? I would used the television for my communication skills to ...
*February 14, 2011*

**math (calculua)**

find the volume of the solid of revolution generated by rotating the graph of y=5lnx about the y-axis between y=0 and y=15
*February 13, 2011*

**math (calculua)**

find the volume of the solid of revolution generated by rotating the graph of y=5lnx about the y-axis between y=0 and y=15
*February 13, 2011*

**math (calculua)**

find the volume of the solid of revolution generated by rotating the graph of y=5lnx about the y-axis between y=0 and y=15
*February 13, 2011*

**British Literature**

Is the following statement a malapropism? "Your reason,dear venom, give thy reason".
*February 12, 2011*

**social studies**

My second grader is writing an essay on the blending of the American Culture. Help please!
*February 10, 2011*

**spelling**

thank you
*February 7, 2011*

**spelling**

what is the easiest definition for menace?
*February 7, 2011*

**Language Arts**

read
*February 7, 2011*

**Calculus**

let f(x)=x*e^x For what value of x is the slope of the line tangent to the graph of function f at [x,f(x)] equal to 1/2?
*February 3, 2011*

**Calculus**

thank you!
*February 3, 2011*

**Calculus**

what is the slope of the tangent to the graph of f(x)= ln [cos(x)] at x= pi/6 ???
*February 3, 2011*

**calculus**

what is the integral of ( x^2 / (x+1)dx
*February 1, 2011*

**english**

I need to compare and contrast the themes of Andrew Marvell's "To His Coy Mistress" and Christopher Marlowe's "The Passionate Shepherd to His Love." Where do I start?
*February 1, 2011*

**algebra**

use substitution method/linear combinations to solve then tell how many solutions they have -7x+7y=7 and 2x-2y=-18
*January 30, 2011*

**6th grade math**

Thanks! :)
*January 30, 2011*

**6th grade math**

That means 4 times 1 is 4 and then multiply by 2 and so the answer is 8?
*January 30, 2011*

**6th grade math**

I still don't get it.
*January 30, 2011*

**6th grade math**

What is 4 divided by n is 1/2?
*January 30, 2011*

**6th grade math**

Thanks.
*January 30, 2011*

**6th grade math**

ms. Sue, 1/4 times 1/2 is 1/8. Then what should I do?
*January 30, 2011*

**6th grade math**

Anyone know?
*January 30, 2011*

**6th grade math**

1/4 times 1/2 is 1/8. Then what should I do?
*January 30, 2011*

**6th grade math**

Thanks again!
*January 30, 2011*

**6th grade math**

Is it 4/1*(1/2)=2/1=2?
*January 30, 2011*

**6th grade math**

Thanks Ms. Sue, I also have one more question. What is 1/2= w/4?
*January 30, 2011*

**6th grade math**

How did you get c=1/5 when you have 5c=2/3 divided by 2/3?
*January 30, 2011*

**Chemistry **

Substance A has a density of 4.0 g/mL and substance B has a density of 2.0 g/mL. If we have equal-mass samples of each, which has the greatest volume?
*January 23, 2011*

**Chemistry **

Substance A has a density of 4.0 g/mL and substance B has a density of 2.0 g/mL. If we have equal-mass samples of each, which has the greatest volume?
*January 23, 2011*

**British Literature**

I need to identify the figure of speech in this saying:"thy mind is an opal." I think it is a metaphor. Am I correct?
*January 23, 2011*

**British Literature**

I need help in identifying the figure of speech in the following statement: "Your reason, dear venom, give thy reason." Any ideas?
*January 23, 2011*

**precalc**

Find sec x if sin x = -0.6 and cos x = 0.8.
*January 21, 2011*

**english**

m too old- is this sentence correct or wrong
*January 21, 2011*

**Biology**

OK, I give up. No where do I find a clear yes or no to this question. Fossil evidence indicates that humans have not undergone many anatomical changes over the last 200,000 years. From what I have read it seems like they have. Am I correct?
*January 20, 2011*

**Biology**

How do the heart, capilaries, arteries and veins work to distribute materials through the body?
*January 19, 2011*

**British Literature**

I did read the sparknotes info but all I could come up with was Roman Catholics, sin, Satan. I can't figure out a way to really make this connect to the story. Any help would be appreciated.
*January 19, 2011*

**Physics**

In an arcade game a 0.087 kg disk is shot across a frictionless horizontal surface by com- pressing it against a spring and releasing it. If the spring has a spring constant of 163 N/m and is compressed from its equi- librium position by 4 cm, find the speed with which the ...
*January 18, 2011*

**Physics**

A 180 g arrow is shot straight up into the air with a speed of 17 m/s. It reaches a maximum height of 13.7449 m. Find the initial kinetic energy. The accel- eration of gravity is 9.8 m/s2 . Answer in units of J.
*January 18, 2011*

**Geometry**

Thank You guys soo much :))
*January 15, 2011*

**Geometry**

How many degrees, like a triangle equals 180 degrees
*January 15, 2011*

**Geometry**

How much does a four sided polygon equal??
*January 15, 2011*

**Geometry**

Explain why you cannot use AAA to prove two triangles congruent.
*January 15, 2011*

**Geometry**

Thank You
*January 15, 2011*

**Geometry**

If two game boards have the same area, are the game boards congruent? Explain your answer
*January 15, 2011*

**english**

What does the dragon in The faerie Queene represent?
*January 15, 2011*

**MAATH**

Rearrange the terms of the equations fo form Ax + By = C I really get confused about general form, like how do I do it, I dont understand at all. x+3y = -1 2x+4y-12 = 0
*January 13, 2011*

**History**

What is absolution?? In detail Please :)
*January 13, 2011*

**MaTH**

Rearrange the terms of the equations fo form Ax + By = C I really get confused about general form, like how do I do it, I dont understand at all. x+3y = -1 2x+4y-12 = 0
*January 13, 2011*

**History**

what is the roman civil law and what time period was it in?? and what was protestant ethic and what time period was that in??
*January 12, 2011*

**English**

How is the gerund used in this sentence?- His least favorite activity is playing scales
*January 12, 2011*

**special populations**

Which has a greater influence on a person’s health: individual choices and actions (micro perspective) or community policies and resource availability (macro perspective)? Discuss three reasons why you selected one over the other.
*January 7, 2011*

**algebra2**

determine the domain and range:{(x,y)|y2=5x}
*January 6, 2011*

**Science**

Which of the following plants is nonvascular? a. ferns b. mosses c. gymnosperms d. club mosses is "b" correct?
*January 6, 2011*

**Science**

Which of the following plants is nonvascular? a. ferns b. mosses c. gymnosperms d. club mosses is "b" correct?
*January 6, 2011*

**Science**

Imagine an environment that is very dry and receives a lot of sunlight. Water is found deep below the soil. Which of the four groups of plants could survive in this environment? Explain your answer.
*January 6, 2011*

**Algebra I (Math)**

okay theirs 2 parts to this problem: (by the way i already did part 1) 1. construct a table of the areas of triangles all of which have bases 6 in. long,but whose altitude are respectively 2 in.,6in.,10 in.,and 14 in. draw a graph to represent given in this table.(this is ...
*January 5, 2011*

**physics**

consider 4 masses mA=1kg, mB=2kg, mC=3kg, mD=4kg, placed at the vertices of a square ABCD of side 4cm. Specify the position of G the center of mass of the system{A,B,C,D}. determine the position of G. Thank you :)
*January 3, 2011*

**math**

could you please help me with this problem
*January 1, 2011*

**math**

Fadi is in a boat 3 kilometers away from the nearest point A at the sea shore.5kilometers away from A is the home of fadi. knowing that he can row 6km/hr and run 10km/hr.the objective of this exercise is to find the position of point B on the sea shore where fadi should land ...
*January 1, 2011*

**chemistry**

A quantity of 0.020 mole of a gas initially at 0.050 L and 20 degrees Celsius undergoes a constant-temperature expansion until its volume is 0.59 L. Calculate the work done (in joules) by the the gas if it expands (b) pressure of 0.20 atm. (C) If gas in (b) is allowed to ...
*December 28, 2010*

**math**

Ok thank you so much :)
*December 21, 2010*

**math**

Hi, Can someone please help me with my math. The distance between Capeton and Jonesville is 80 miles. Thescale on the map is 0.75in : 10 miles. How far apart are the cities on the map? A. 6in B. 60in C. 600in D. 1067in Thank you :)
*December 21, 2010*

**Math Problem Solving**

Oh im sorry i did this problem wrong. Ms.sue did it correct :) Sorry again.
*December 21, 2010*

**Math Problem Solving**

6n+8n-2n+3/2 6n+8n=14n-2n=12n+3/2 answer: 12n+3/2
*December 21, 2010*

**chemistry**

8. If x grams of S are needed to obtain 0.4 grams of SO3, how many grams of SO2 can be obtained from the same amount of S? (A) 0.32 g (B) 0.62 g (C) 0.40 g (D) 0.16 g (E) Can not be calculated from the given data. I am not sure how to set up this problem. I calculate the ...
*December 20, 2010*

**Psychology**

As you enter your Grandma Thorndike's house you ears being to hurt as you notice she is once again playing her favorite "Contry Music" album. You soon get caught up in the christmas festivities...talking with family..eating...and playing psychological trivia. The...
*December 19, 2010*

**Medical Insurance**

A hospital received a reimbursement rejection from the fiscal intermediary for two outpatient procedures that were performed the same day. Who generated the rejection?
*December 17, 2010*

**helping abused children**

what happens in most cases of sexual abuse a-the abuser is removed immediatley from the home b-the abuser is prosecuted in court c-nothing can be done until evidence is found d-the abuser receive institutuional counseling as a precautionary measure
*December 16, 2010*

**helping abused children**

the stubborn child law of 1646 by the state of massachusetts permits parents to do what
*December 16, 2010*

**math**

Jim divied -2 by an integer and his result was between -1 and 0 Which integur could have been the divisor
*December 16, 2010*

**math 116**

-2[38(-56-50) -2[38-106]
*December 16, 2010*

**Algebra**

How do you find the Horizontal Asymptote of y= (x+2)/(x-6)?
*December 14, 2010*

**Geometry**

Thank You
*December 14, 2010*

**Geometry**

Ya its correct
*December 14, 2010*

**Geometry**

The m<A is 10 more than 4 times its supplement. Find the m<A. I dont understand how to solve this problem.. Thank You for your help.
*December 14, 2010*

**AlgebrAlgebra-Mathmate or BobPursley or Reiny**

Thank you-I understand what you're saying-I really appreciate the help
*December 14, 2010*

**AlgebrAlgebra-Mathmate or BobPursley or Reiny**

I had asked a question earlier and bob pursley nicely answered it but I do have a question concerning it still- perhaps someone could clarify it- f(x) = logx is a logarthmic function. Bob Pursley said it could be because the base is implied but my question is the way it is ...
*December 14, 2010*

**Business Communication**

You are a technical writer in a large company who is working on a training manual to help new users learn the company's computer system. Employees will use your manual in training seminars taught by your company's trainers. The manual will also serve as an on-the-job ...
*December 14, 2010*

**Business Communication**

I put A as the answer
*December 14, 2010*

**Business Communication**

A. decision makers or opinion molders in an organization. B. everyone who receives it. C. individuals with the highest status in an organization. D. people who represent the opinions or attitudes of the majority.
*December 14, 2010*

**Business Communication**

The primary audience for your message is made up of
*December 14, 2010*

**Algebra-Mathmate or Reiny or Dr. Bob, please check**

Thank you-could you look at my new post-I just needed clarification about f(x) = logx you said this would be true but doesn't it need parentheses or a separation between log and x for this to be correct? Thank you
*December 14, 2010*

**Algebra-Bob Pursley please check-Mathmate or Reiny or Dr. Bob, please check**

I just noticed something-I had asked about if f(x) = 1/x is an exponential function and I think you rewrote it as f(x) = x^-1. Therefore, f(x) = 1/x is NOT an exponential function, correct?
*December 14, 2010*

**Algebra-Mathmate or Reiny or Dr. Bob, please check**

Thank you for the explanations- I appreciate it
*December 14, 2010*